Randall J. Holder

Energen Corp. is an independent oil and natural gas company, which engages in the acquisition, development, exploration, and exploitation of onshore oil and natural gas reserves. Its portfolio includes the Permian Basin in West Texas. The company was founded on October 26, 1978 and is headquartered in Montgomery, AL.

Dollar Thrifty Automotive Group, Inc., through its subsidiaries provides commercial car rental services. It operates company owned stores under the Dollar brand and the Thrifty brand, operates reservation centers conducts sales and marketing activities for both brands. The company was founded on November 24, 1997 and is headquartered in Tulsa, OK.

Viper Energy Partners LLC engages in the exploration of petroleum and gas. The company is headquartered in Midland, TX.

Thrifty Rent-A-Car System, Inc. provides commercial car rental services. It offers a selection of rental vehicles ranging from economy, compact, mid-size & standard cars. The company was founded in 1958 and is headquartered in Tulsa, OK.

Oilfield Management Services LLC is a diversified oilfield service company. It provides horizontal drilling and well stimulation services primarily in the onshore unconventional tight sands and shale oil and natural gas. The company operates through two segments: Completion & Production Services and Horizontal & Directional Drilling Services. The Completion & Production Services segment provides pressure pumping and pressure control services. The Horizontal & Directional Drilling Services segment is designed to drill unconventional wells. The company was founded on September 29, 2005 and is headquartered in Oklahoma City, OK.